package com.lkx.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lkx.common.BaseContext;
import com.lkx.common.CustomException;
import com.lkx.common.R;
import com.lkx.mapper.OrderMapper;
import com.lkx.pojo.*;
import com.lkx.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @ClassName: com.lkx.service.impl.OrderServiceImpl
 * @author: likaixin
 * @create: 2022年11月27日 10:57
 * @desc:
 */
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private UserService userService;
    @Autowired
    private OrderDetailService  orderDetailService;
    //用户下单
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lqw);
        if (shoppingCarts==null || shoppingCarts.size()==0){
            throw new CustomException("当前尚未添加购物车，不能下单！");
        }
        //查询用户数据


        User user = userService.getById(userId);
        //查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (Objects.isNull(addressBook)){
            throw new CustomException("用户地址信息有误，不能下单！");
        }
        long orderId = IdWorker.getId();//订单号
        //原子类 保证线程安全
        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        //向订单表插入数据，一条数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        int sum=0;
        for (int i = 0; i < shoppingCarts.size(); i++) {
           sum+= shoppingCarts.get(i).getNumber();
        }
        orders.setSumNum(sum);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //情况购物车数据'
        shoppingCartService.remove(lqw);
    }

    @Override
    public R<Page> showOrders(int page,int pageSize) {
        Page objectPage = new Page<>();
        LambdaQueryWrapper<Orders> lqw = new LambdaQueryWrapper<>();
        lqw.orderByAsc(Orders::getOrderTime);
        lqw.eq(Orders::getUserId,BaseContext.getCurrentId());
        this.page(objectPage,lqw);

        return R.success(objectPage);
    }
}
